Should I or shouldn't I....

[whitewolf001]

purchase this product? http://www.canisdesigngroup.com/m4-conversion-for-ak.html
Posted a previous thread looking for leads on mags with no luck. I am a stickler for permanently modifying firearms from the original configuration. The cost of 8 mags is going to run me about $360 vs this which is about $100 cheaper AND I can have magazine AND ammo compatible weapons between my AR and the AK. I have read on several other sites such as the survivalist boards and ARFCOM that the clear Circle 10 Bulgy mags can crack and break. The Black mags are supposedly good to go BUT I don't want to drop nearly four Benjamin's on mags that will just break. Any advice gents?  I'm really on the fence on this one. A note, this same company has a adapter that requires no modifying of the weapon, just the adapter for fitment BUT they are and have been very much sold out, much to my luck. If they release this once again, you can bet your sweet butt that I will buy one up fast and in a hurry. http://www.canisdesigngroup.com/m4-magazine-adapter-for-ak.html